| 摘要 |
A closure system for a motor vehicle includes a closure, a closure frame, an electric motor, a control switch, an electrical power source, first and second displacement sensors, means for sensing a temperature, means for sensing a current being drawn by the electric motor and a microprocessor. The electric motor has an output shaft. The closure frame defines a seated position of the closure. The electrical power source includes a battery. The first and second displacement sensors each operably generate a signal indicative of the one of closure movement and output shaft rotation. The microprocessor is electrically connected to the control switch, the electric motor, the first and second displacement sensors, the means for sensing a temperature and the means for sensing a current. The microprocessor includes means for electrically connecting the motor with the power source responsive to a condition of the control switch. The microprocessor also has means for converting temperature sensed to an electrical signal indicative of the temperature. The microprocessor also includes means for converting current sensed to an electrical signal of motor current, and means for calculating a drag force of the closure at predetermined positions as indicated by signals from the displacement sensors as the closure is moved from an open position to the seated position. The microprocessor further includes means for calculating a compensated drag force using the drag force and a temperature correction factor. The microprocessor yet further includes means for comparing the drag force with a reference drag force and electing to reverse the motor when the compensated drag force is less than the reference drag force.
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